energy case study

Energy audit
ekz wohlgelegen

Name & Location

EKZ Wohlgelegen
Mannheim, Germany

Type

Retail

Constructed

2004, Modernised in 2016

Area

14,870 m²

Project Details

Clients begin to recognize that resource efficient assets are more attractive to tenants and therefore are more competitive in the real estate market. The aim of this energy audit was to establish a continuous improvement process for the retail asset at hand. Major tasks were to obtain an overview of the energy efficiency of the asset as well as to determine available utility data. Ultimately, the objective is to develop measures to enhance building performance.

As a basis to calculate suitable energy efficiency measures a thermal building model was created (see figure below).
The calculated CO2-emissions are at 115 kg/(m²*a) and the final energy demand is at 293 kWh/(m²a) (including plug-loads of tenants). In order to meet the so called “< 2° target” by 2050 and the asset to remain competitive the target CO2-emissions should be at 14 kg/(m²*a) and the final energy consumption at 100 kWh/(m²a).

The findings of this audit were grouped in two categories. The first category of measures can be implemented immediately (e. g. energy efficient pumps and lighting, re-commissioning of HVAC systems). The second category is concerned with the end-of-useful life of major building parts and technical equipment (e. g. roof, heating system). By implementing those measures the annual carbon footprint could be cut by almost 50%. Furthermore, a continuous process to engage with the tenants on energy efficiency matters has to be established.

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